Search: id:A134483
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%I A134483
%S A134483 1,3,4,5,6,7,7,8,9,10,9,10,11,12,13,11,12,13,14,15,6,13,14,15,16,17,18,
%T A134483 19,15,16,17,18,19,20,21,22,17,18,19,20,21,22,23,24,25,19,20,21,22,23,
%U A134483 24,25,26,27,28
%N A134483 Triangle read by rows: T(n,k)=2n+k-2; 1<=k<=n.
%C A134483 Row sums = the heptagonal numbers, A000566: (1, 7, 18, 34, 55, 81,...).
%C A134483 Row n consists of n consecutive integers starting with 2n-1. - Emeric 
               Deutsch (deutsch(AT)duke.poly.edu), Nov 04 2007
%F A134483 T(n,k)=2n+k-2 for 1<=k<=n. G.f.= tz(1+z+2tz-4tz^2)/[(1-z)^2(1-tz)^2] 
               - Emeric Deutsch (deutsch(AT)duke.poly.edu), Nov 04 2007
%e A134483 First few rows of the triangle are:
%e A134483 1;
%e A134483 3, 4;
%e A134483 5, 6, 7;
%e A134483 7, 8, 9, 10;
%e A134483 9, 10, 11, 12, 13;
%e A134483 ...
%p A134483 for n to 10 do seq(2*n+k-2,k=1..n) end do; # yields sequence in triangular 
               form - Emeric Deutsch (deutsch(AT)duke.poly.edu), Nov 04 2007
%Y A134483 Cf. A000566.
%Y A134483 Sequence in context: A095254 A121857 A121854 this_sequence A121151 A088243 
               A154660
%Y A134483 Adjacent sequences: A134480 A134481 A134482 this_sequence A134484 A134485 
               A134486
%K A134483 nonn,tabl
%O A134483 1,2
%A A134483 Gary W. Adamson (qntmpkt(AT)yahoo.com), Oct 27 2007

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